I have tried hunting every which way and cannot find a single thing regarding the track in this trailer below. it is NOT in the OST for the game itself...I know cause I bought it and it was the only thing I really wanted and it wasn't there.

could anyone point me in the right direction of the artist or something to narrow it down?? Thanks in advance for any help !!

http://www.youtube.com/watch?v=W_obv3YMDDI